issue: flag for adding epfd to inter thread epoll

[iftahl]

Description

Please provide a summary of the change.

What

Subject: what this PR is doing in one line.

Why ?

Justification for the PR. If there is existing issue/bug please reference.

How ?

It is optional but for complex PRs please provide information about the design, architecture, approach, etc.

Change type

What kind of change does this PR introduce?

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation content changes
• [ ] Tests
• [ ] Other

Check list

• [ ] Code follows the style de facto guidelines of this project
• [ ] Comments have been inserted in hard to understand places
• [ ] Documentation has been updated (if necessary)
• [ ] Test has been added (if possible)